Flange

Forged Steel Pipe Flanges | Weld Neck, Slip-On & Blind

Steel flanges are essential components in piping systems, providing secure, leak-proof connections between pipes, valves, pumps, and other equipment. Unlike welded or threaded joints, flanges allow for easy assembly, disassembly, and maintenance of pipelines, making them highly versatile in various industrial applications.

They are typically manufactured from carbon steel, stainless steel, or alloy steel, and can be customized with different pressure ratings, sizes, and facing types to suit specific project requirements. Each flange undergoes precise machining and quality inspection to guarantee perfect flatness, accurate bolt hole alignment, and excellent sealing performance.

With superior strength, corrosion resistance, and long service life, our steel flanges are widely used in industries such as oil & gas, petrochemical, shipbuilding, power generation, water treatment, and construction. Whether you need weld neck, slip-on, socket weld, threaded, lap joint, or blind flanges, we can provide a full range of solutions tailored to your project’s technical needs.

product details

Key Features

Manufactured from high-quality carbon steel, stainless steel, or alloy steel

Available in pressure classes from 150 lbs to 2500 lbs

Precise machining ensures excellent sealing performance

Corrosion-resistant surface treatments (galvanizing, painting, etc.)

Easy installation, replacement, and maintenance

Compatible with gaskets and bolts for secure connections

Technical Specifications

Product	Steel Flanges
Material	Carbon steel (A105, Q235), stainless steel (304/316/316L), alloy steel (F11, F22), duplex steel
Sizes Range	½" – 48" (DN15 – DN1200)
Facing Type	RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint)
Pressure Rating	Class 150 / 300 / 600 / 900 / 1500 / 2500
Surface Finish	Anti-rust oil, black coating, galvanizing, pickling & passivation
Dimensions Standards	ANSI B16.5, ASME B16.47, DIN 2633, JIS B2220, EN 1092-1

Applications

Oil & Gas Pipelines, Refineries & Offshore Platforms
Used in high-temperature and high-pressure pipeline systems, providing secure connections for pumps, valves, separators, and pressure vessels. Designed to withstand pressure fluctuations and corrosive media in harsh offshore and onshore environments.

Petrochemical & Chemical Processing Plants
Essential for connecting heat exchangers, reactors, pipelines, and chemical equipment. Stainless steel flanges are ideal for corrosive chemicals, while carbon steel flanges offer economical solutions for general processing lines.

Shipbuilding, Marine & Offshore Engineering
Applied in seawater cooling lines, fuel systems, engine pipelines, and ballast systems. Surface-treated flanges deliver long-lasting resistance to saltwater corrosion and vibration.

Power Generation, Boilers & Steam Systems
Used in thermal, nuclear, and renewable power plants. Provide reliable connections in high-temperature steam lines, condensers, and cooling water systems, ensuring safe and efficient operation.

Construction, Municipal Water & Wastewater Projects
Installed in building HVAC networks, municipal water supply pipelines, and sewage treatment facilities. Enable quick installation, section replacement, and routine maintenance without dismantling entire systems.

Industrial Machinery, Manufacturing & Global EPC Supply
Support mechanical equipment assembly, factory pipeline networks, and international engineering projects. Their global standardization ensures compatibility across Asia, Europe, the Middle East, Africa, and South America.

Product Inspection

Our steel products undergo comprehensive inspection before delivery to ensure quality and compliance with international standards. Inspections include dimensional measurements such as length, diameter, wall thickness, and width, as well as surface quality and overall appearance. Mechanical properties and chemical composition can also be tested according to customer requirements.